Lifting-jack



m/ w f E Patented July 15, 1890 /Nvmron Z'waC//grz M ATTORNEY E. COVERT.LIPTING JACK.

UNITED STATES PATnNT ENOOII OOVERT, OF FARMER VILLAGE'NEIV YORK.

LlFTlNG-JACK.

SPECIFICATION fOrmng part f Letters Patent N0. 432,230, dated Julyl,1890. f

Application filed May 23, 1890. Serial No. 352,861. (No model.)

T0 all whom it may concern:

Be it known that I, ENocH CovEnT, a citizen of the United States,residing at Farmer Village, in the county of Seneca and State of NewYork,haveinvented certain new and useful Improvements in Lifting-Jacks;and I do hereby declare that the following is a full, clear, and exactdescription of the same, reference being had to the annexed drawings,making a part of this specification, and to the letters of referencemarked thereon.

This invention relates to certain new and useful improvements inlifting-jacks; and it has for its object to provide a simple, cheap, anddurable device of this character com- V posed of few parts, readilyassembled, and occupying but little space.

Other objects and advantages of theinvention will hereinafter appear,and the novel features will be specifically defined by the appendedclaim.

The invention is clearly illustrated in the accompanying drawings,which, with the letters of reference marked thereon, form apart of thisspecification, and in whichy Figure l is a side elevation of myirnprovedlifting-jack with parts broken away. Fig. 2 is a View looking at rightangles to Fig. l.`

Like letters of reference indicate like parts in both Views.

` Referring now to the details of the drawings by letter, A designates asuitable base of metal formedwith arched ribs a for strength and with ascrew-threaded opening through a boss b, formed at the junction of theribs, as shown clearly in Fig. l.

B is a tube screw-threaded at its lower end and engaging ther threads ofthe aforesaid boss, as shown in Fig. l.

O is a rod or tube adapted to work vertically within the tube E and atits upper end is connected with the head D either bybeing screwed intoor riveted to the same. This head is formed with offsets b, as shown inFig. l, to receive and support the axle, there being three shown,although of course it will be evident that this number may be varied, ifdesired.

E are bars pivoted at their lower ends on a pivot c to one of the ribsof the base, as shown best in Fig. 2, and between these bars, at theirupper ends, is pivoted on the cross pin or pivot the lever F, the upperend of which is pivotally connected with the head by a pin or pivot (Z,a recess e being formed in the head for the reception of the upper endof the lever, as shown in Fig. 2.

The operation will be readily understood from the above description whentaken in connection with the drawings. Vhen the lever is thrown down toraise the head, the three pivots c, d, and f are brought into the samevertical line and the head thus held in its elevated position. The partsmay be readil57 separated and packed in small space for shipment ortransportation.

In a lifting-jack, a base formed with arched ribs and having ascrew-threaded boss, a tube connected thereto, a rod working in thetube, a screwthreaded head with the rod threaded thereinto, bars pivotedto one of the ribs of the base, and an operating-lever connected theretoand to the head, substantially as specified.

In testimony that I claim the above I have hereunto subscribed my namein the pres-4 ence of two witnesses.

ENOCH COVERT.

Witnesses:

O, G. WHEELER, J. D. WrNrEns'rEEN.

